Gear down and go big. Your Defender isn’t your Defender until you’ve got a big lift and some massive mud grips on it. This 8" GDP Portal Gear Lift gives you huge clearance and the option of a 45% or 60% gear reduction for boosted torque. For the most extreme ride, choose the 70% gear reduction with dual idler gears.
With GDP, you get a big portal lift that’s built to handle serious mud. The 8" portals also allow room for up to a 44" tire, helping you push through deep terrain with more torque and less strain on your machine.
Dual idler gear option. By placing a second idler gear in the portal box, the load is spread over twice as much surface area for more reliable torque transfer and a stronger gear set. The gears are precision CNC ground and made from 9310 steel alloy for smooth, quiet performance.
Built to protect your drivetrain. Portal gear reduction happens right in the hub, helping reduce stress on your axles, differential, prop shaft, and transmission, even with large tires.
Strong construction and sealing. Features include reinforced housings, advanced steel alloy backing plates, advanced gaskets and O-rings, a sealed input gear, double-lipped output seal, double-angular contact output bearings, and roller idler and drive bearings for proper gear meshing.
Available with billet or cast aluminum housings
Dual idler gear configuration maximizes strength
Cool, quiet, precision-ground gears made from 9310 alloy steel
1.5" forward and rear offset
Increases width by 4" per side, 8" total
1.5" diameter 4340 hardened steel drive shaft
Universal hub fits all major bolt patterns
Gear reduction reduces stress on your drivetrain
Important notes. A frame stiffener is required because of the added lift and strength of these portals. A big lift kit or 2" Forward Offset A-Arms are strongly recommended.
Includes:
(4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, gaskets, and thrust bearings
(4) Universal hubs and precision-ground stainless steel slotted rotors with lugs
(4) Specialized steel alloy backing plates
(4) Steel caliper mounting plates
Extended brake lines
Steering stop kit (dual idler configuration only)
All required hardware, including recessed castle nut socket
Frame stiffener (must select at checkout)
Max tire and suspension recommendations:
40" tire: 2" Forward Offset A-Arms
44" tire: 6" Lift Kit
Max tire sizes are measured at full compression and full turn. The listed sizes are the largest we fit without rubbing; with minor trimming or a small amount of rub, larger tires may be used. If you need help choosing the right gear reduction, use the portal gear reduction calculator.
Fitment:
Can-Am Defender HD 5: 2017-2021
Can-Am Defender HD 5 DPS: 2017-2021
Can-Am Defender HD 8: 2016-2021
Can-Am Defender HD 8 DPS: 2016-2021
Can-Am Defender HD 8 XT: 2016-2021
Can-Am Defender HD 8 XT Cab: 2016-2021
Can-Am Defender HD 8 XTP: 2018-2021
Can-Am Defender HD 9: 2022+
Can-Am Defender HD 9 DPS: 2022+
Can-Am Defender HD 9 XT: 2022+
Can-Am Defender HD 9 DPS CAB: 2022+
Can-Am Defender HD 10: 2016+
Can-Am Defender HD 10 DPS: 2016+
Can-Am Defender HD 10 XT: 2016+
Can-Am Defender HD 10 XT Cab: 2016+
Can-Am Defender HD 10 XTP: 2018+
Can-Am Defender HD 10 Mossy Oak: 2018+
Can-Am Defender HD 10 XMR: 2018+
Can-Am Defender HD 10 Limited: 2020+
Can-Am Defender HD 10 PRO: 2020+
Can-Am Defender MAX HD 8: 2017-2021
Can-Am Defender MAX HD 8 DPS: 2017-2021
Can-Am Defender MAX HD 8 XT: 2017-2021
Can-Am Defender MAX HD 8 XT Cab: 2017-2021
Can-Am Defender MAX HD 9: 2022+
Can-Am Defender MAX HD 9 DPS: 2022+
Can-Am Defender MAX HD 9 XT: 2022+
Can-Am Defender MAX HD 10: 2017-2021
Can-Am Defender MAX HD 10 DPS: 2017+
Can-Am Defender MAX HD 10 XT: 2017+
Can-Am Defender MAX HD 10 XT Cab: 2017+
Can-Am Defender MAX HD 10 XMR: 2019+
Can-Am Defender MAX HD 10 Lone Star Edition: 2018+
Can-Am Defender MAX HD 10 Limited: 2020+
Note: Big Lift Kit or 2" Forward Offset A-Arms strongly recommended.
Wheel requirements:
22" or larger wheel required
Wheels cannot exceed 5" backspacing
Wheels need a center hole of at least 3.25" (82.55 mm) or require a 1" wheel spacer